Warp stop mechanism for looms.



J. & H. WRIGHT. WARP STOP MEGHANISM POR LOOMS. i l APPLICATION 'ILBD APILG, 1909. 978,345. j .Patented.Dec.13,1910'.-

J. c H. WRIGHT.

WARP STOP MECHANISM FOR LOOMS. APPLICATION FILED Anm, 1909.

Patented Deo. 13, 1910.

2 SHEETS-SHEET 2 thereto.

UNITED STATES l PATENT oEEIoE.

JAMES WRIGHT AND HEBBEN WRIGHT, OF INGROW, NEAR KEIGHLEY; ENGLAND.

waar sroze MECHANISM non Looms.

specification of Lettersratent.

Patented Dec. 13, 1910.

Application filed April 6, 1909. Serial No. 488,325.

HEBBEN VRIGHT, subjects of the King of Great Britain, residing at The Whins, Ingrow, near KeighleyI in the county of York, England, have invented certain new vand useful Improvements in Warp Stop Mechanism for Looms, of which the following description, .together with the accompanying sheets of drawings, is a specification.

Our invention relates to warp stop mechanism for looms, and particularly to that type wherein the detectors are situated between the healds and the back rail of said looms, lor in proximity to the lease rods, or the positions in which said lease rods are mounted, and our saidinvention consists in an improved method of mounting or supporting the detectors and the parts in connection with which they operate so that simple and elicient warp stop mechanism is produced and at less cost than those heretofore made use of. This object we at tain by the employment of devices hereinafter described and as illustrated by the accompanying sheets of drawings, wherein Figure l is a sectional end elevation of the back-rail and slayboard of a loom, shoving the application of our improved devices lheother framework is omitted for the sake of clearness while the positions of the several parts are as when the weft is being' beaten up, with all the threads of the warp intact. Fig. 2 is a similar View to Fig. l but shows the parts in position when the shot of weft is being nearly beaten up and when one of the warp threads is broken. Fig. 3 is an end elevation of certain parts shown by Figs. 1 and 2 with the detector in position as shown by Fig. 1. Fig. 4 is also an end elevatio'n of certain parts shown by Figs. l and 2, with the detector in position as shown by Fig. 2. Figs. 3 and 4 are drawn approximately full size. Fig. 5 is a sectional end elevation similar tc Fig. 3 but shows parts behind these which are shown in Figs. l and 2, and is drawn to an enlarged scale as compared with Figs. l'and 2. Fig. (5 is a plan of the parts shown by Fig. 5 but shows only two warp threads, one taking over one lease"` rod and the other 4over the other lease rod.

Fig. Y is a front elevation of the parts shown Fig.

Similar letters .and figures of' reference indicate similar .parts throughout the se'veral views. I

A indicates the back-rail, B the slayboard, and -C the warpfbeam of the loom. The warp in passing from the beam C is conducted over the back-rail A. forward past the slayboardoBpn a manner well un-v derstood,` and we make use/of detectors a which are situated in proximity to the back' rail A. These detectorsa are pivoted at one end on rods b which are supported within framework formed by the longitudinal ribs 2 and 3, end-pieces 4 and 5,- and cross pieces 6 the free ends of 'the detectors Abeing supported by the warp threads.- lThe cross pieces 6 have slots c. formed in them to receive a bar d which extends 'lengthwise the frame formed by the ribs 2 and 3 and end pieces 4 and 5. These bars d are caused to reciprocate or move backward and 'forward by having openings in their outer ends to take over pins 7", f secured to the sliding pieces g, g. These sliding pieces g, g are mounted to slide in notches formed 1n the bearings L, and said bearings L, are pivoted at 8 to brackets lc, k fixed upon back-rail A. The bearings i1., are sustained or supported by springs m, taking lbetweenthem and extensions kz on the brackets la, 7c. Bythus resilientlysuppor'ting the bearings h, thedetectors a and the framework carrying. them are allowed to beA moved .by the pull of the.

warp threads without putting toogreat, a

strain thereon.

The sliding pieces g, g are actuated by lever arms n, fixed upon the shaft p which extends across the loom beneath the warp threads g. This shaft is carried by the bearings h, through openings in whichl it passes so that by having another lever r secured to it oscillatory motion may be transmitted to said shaft p as `said lever r is re 'ciprocated To this levez=` r is' attached a s )ring s which alwa s tends tol move it in the direction indicated b the arrow t, while 100 also connected to said ever 1' is a rod u which reaches from it to b'e connected at 10 to the lever o pivoted to the loom frame in any suitable manner (not shown); The exsaid lever 'n so that the projections thereon may, when moved, as hereinafter described, tilt the catch u2 upon its pivot 1l, by which action it is moved out ofthe path of motion of the bunterw fixed to the slayboard B 110' Vtending end u of the rod u reaches beyond when said slayboard B is advancing into the position shown by Fig. l.

Motion is transmitted to the lever r in the direction opposite to that indicated by the arrow t by means of the lay-sword, shown in broken lines Figs. l and 2,-contacting with the projecting pin "v2 secured or fixed upon the lower arm of the lever o and extendinginto the path of motion of said laysword.

It will be observed that we have two sets of detectors a, and two reciprocatingbars (l mounted. within their respective framework, which is of the characterhereinbcfore clescribed, and these two sets are so situated as to act in each case as lease rods, that is to say one-set of the frameworkacts as one lease rod and the other set acts as the other lease rod, and the sheetof warp threads is divided into two portions, the threads of one portion passing over oir-setof frame-l work and underthe next set, while the other warp threads pass Aunder .the former and over the latterA thus the threads of warp are divided A-mto two series which lare are4 ranged to receive their respective detectors a as Ashown by the several figures, witli the result that overcrowding of said detectors is in well known manner relieved. It is quite evident that provided we wanted to further relieve said warp threads from overcrowding we might sub-divide them so that another set of framework might be em-v ployed to receive detectors for actuating in conjunction with the additional division of the warp threads passed over it.

The actions of the foregoing parts are as follows: As the slayboard moves backward and forward in well known manner and for well known purposes its laysword contacts in one direction with the pin 1:2 of the lever t' so that said lever pulls the rod u to actnate the lever r and this moves'the shaft 11 which by the lever 'n causes the sliding pieces ya ,f/ to take the bars (l tothe left Fig. On the return of said slayboard the spring s will reverse the motion 'of the lever 1' and therefore that of the bar-s (l, and will, (while the vdetectors are supported by .the intact or unbroken warp threads) continue to move under the pnll of the spring s to the extent' of their slots in the framework 2 and 3, and at this time the rod u will have been bronght'with its' projections u to tilt the catch z' into the position shown by Fig. l, so that the bunter fw may move beneath same and allow the loom tol proceed l'in its mot-ion. Provided however that one or other of the warp threads g is broken then its respective detector a will descend and lay hold of its bar (l to prevent same being moved by-the recoil of the spring s so that such bar rZ will arrested in the position shown by Figs. 2 and 4', at which time the lever 1" and consequently its rod u with its project-ion the operation of the loom.

a will be arrested before such projection u has reached the catch u2, therefore such catch u2 remains in the path of motion of the bunter 'w and on its advancingvaction l will be forced or moved by said bunter to carry the handle y (which actuates the beltshifter or other stop motion mechanism of the loom) thus to bring about the stoppage of the loom. y

Such being the nature and object of our said invention, what we 'claim is i 1. An improved warp stop mechanism comprising aframe provided with longitudinal parts extended between the sheets of -warp threads, av rod extended longitudinally of said frame, a plurality of detectors each having one end engaging said rod, the other end of each detector being supported by the warp threads, bearing members carried by said frame, sliding members mounted in said bearing members `means for reciprocating said sliding ,men'1bers, a bar removably snpported by said sliding members b'elow said detectors` and means controlled by said barfor arresting the operation of the loom. Y

2. An -improved warp stop mechanism comprising a frame provided with longitudinal parts extended between the sheets of warp threads, a rod extended longitudinally of said frame, a plurality of detectors each having one end engaging said rod, the other end of each detector being snpjiorted by the warp threads, pivoted bearing members for said frame, means for resiliently supporting the free ends of said bearing members, slid- 100 4invffmembers mounted in said bearing members. means for reciprocating said sliding members, a bar removably supported by said sliding members. below said detectors,

and means controlled by said ba r for arrcsting the operation of the loom.

3. An improved warp stop mechanism comprising a frame provided with logitudinal parts extended betw'een the sheets of warp threads, means Ifor pivotally snpporting the frame outside of the sheets of said warp threads, a plurality of detectors cach having one end mount-ed in said frame, the

other en'd of each vdetector being normally supported by the warp threads, a bar monnt- 1l 3 ed to reciprocate in said frame below said detectors and arranged to engage the latter npori the breaking of a warp thread, and means controlled by said bar for arresting lef 4. An improved vwarp stop mechanism comprising a frame provided with longitudinal parts extended between the sheets of warp threadshpivotally mounted bearing members for supporting the frame4 outside 12 of the sheets of w'arp threads, resilient supports for said bearing members. .i plurality of detectors each having one end mounted in said frame, the other end of each detector being normally supported by the warp 13') CTL threads, a bar mounted to reciprocate in said frame below said detectors and arranged to engage the latter upon the breaking of a 'warp thread, and means 'controlledby said `parts extended between the sheets of warp threads, yielding supports for said frame outside-of the sheets of warp threads, a plurality of detectorsy mounted in said frame and normally supported bythe w'arp threads, a bar mounted to reciprocate in said frame below said detectors and arranged to engage the latter upon breaking o a warp thread, and means controlled by said bar for arresting the operation of the loom.

6. In warp stop mechanism, a detector, framework and like devices for supporting said detector, said framework passing between the sheets' of warp, hinged supports for said framework, springs for sustaining said hinged supports so that -the warp threads are relieved of the weight of the L parts passing between them, sliding devices mounted on said hinged supports, means whereby said sliding devices are actuated.

'and' means whereby the arresting-of said sliding devices brings about the stoppage of the loom, substantially as set forth.

7. An improved warp stop, mechanism comprising a frame provided with longitudinal parts lextended between the sheets' of warp threads, a rod extended longitudinally of said frame, a plurality of detectors each having'one e'nd .enga ing said rod, the other end of each detector eing supported by the warp threads, bearing members carried by said frame, sliding membersmounted in said i bearing members, a rock shaft provided with means for reciprocating said sliding members, a power controlling mechanism, a catch controlling the same, means connected with said rock shaft for actuating said catch, and a bunter mounted on a movablepart of the loom and coperating with said catch.

In testimony whereof wehave hereunto afIiXed our signatures in presence of two witnesses.

JAMES WRIGHT. HEBDEN WRIGHT. Witnesses:

RD. B. NICHoLLs, JOHN WHITEHEAD. 

